bump zsh grammar, fix regex with expansion

regex with expansions will cause error if injected regex grammar used, disallow

lua/nvim-treesitter/parsers.lua

@@ -2703,7 +2703,7 @@ return {
   },
   zsh = {
     install_info = {
-      revision = 'v0.36.0',
+      revision = 'v0.42.0',
       url = 'https://github.com/georgeharker/tree-sitter-zsh',
     },
     maintainers = { '@georgeharker' },

runtime/queries/zsh/injections.scm

@@ -2,6 +2,7 @@
   (#set! injection.language "comment"))
 
 ((regex) @injection.content
+  (#not-match? @injection.content "\\$\\{.*\\}")
   (#set! injection.language "regex"))
 
 (heredoc_redirect